I don't know when TTR arrived on the internet scene, I joined 12 years ago. Over that time several prolific members have passed away. Sometimes it is mentioned, but finding out is by chance. I have met several individuals here, and continued friendships in person which is one great thing about TTR. It may be just too touchy a subject, maybe too hard to track. Admins would know when they get a request to close an account. Strangely enough, it could be made as a subheading to "Welcome Wagon" section. But maybe I am way off the bat. Don't wish to be insensitive here. Plus privacy issues are involved. I do know that Facebook has a section you can fill out to instruct them how to handle the account after someone has died. Just curious.
I think what you are looking for is already part of TTR. https://www.thetruckersreport.com/truckingindustryforum/forums/remembrances-virtual-memorials.153/